/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 * @filename: select_union.h
 */ 

#ifndef __SELECT_UNION_H__
#define __SELECT_UNION_H__


class select_union :public select_result_interceptor
{
  Tmp_Table_Param tmp_table_param;
  
public:
  Table *table;

  select_union() :table(0) {}
  
  int prepare(List<Item> &list, Select_Lex_Unit *u);
  
  bool send_data(List<Item> &items);
  
  bool send_eof();
  
  bool flush()   ;
  
  void cleanup() ;
  
  bool create_result_table(Session *session,
                           List<Item> *column_types,
                           bool       is_distinct, 
                           uint64_t   options,
                           const char *alias,
                           bool bit_fields_as_long);
};

#endif /* __SELECT_UNION_H__ */
